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JLD Bridge Doctor

4.5
  • 133 Reviews
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JLD Bridge Doctor Screw mount

Screw mount

Item # 3694
In stock, ready to ship!

$22.50

3 or more $20.02
+
JLD Bridge Doctor Brass pin mount

Brass pin mount

Item # 3695
In stock, ready to ship!

$52.75

3 or more $46.95
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JLD Bridge Doctor

About This Item

• Enhances volume
• Flattens 'bellied' soundboards

A unique solution to a common bridge problem, this spruce device attaches beneath a guitar bridge. An adjustable spruce "pressure post" rests against the tailblock, providing leverage to flatten the soundboard.

The spruce block is 3/4" x 1-5/8" x 3-3/8" tall. The 1/4"-diameter tension rod is 9" long. The mounting post has three different positions to accomodate a variety of bridge styles.

Screw mount: This spruce device attaches beneath the bridge via an inlaid screw (a white pearloid dot is included to hide the bridge screw). An adjustable spruce pressure post rests against the tailblock, providing leverage to flatten the soundboard. Better bridge contact and alignment can also enhance sound projection.

Brass pin mount: The pin-mounted version of the JLD Bridge Doctor attaches beneath the bridge using a threaded brass bridge pin. The strings mount horizontally through the tops of the matching brass bridge pins (included).

StewMac Tech Tip: We recommend the brass pin mount version for 12-string guitars.


Instructions

Product Instructions

JLD Bridge Doctor Instructions

How to install the JLD Bridge Doctor in an acoustic guitar.

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4.5
  • 4.62 average rating from 133 reviews
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5.0

awesome

By

Verified Buyer


This thing is really amazing - so simple, yet so perfect. You'd think that adding mass would deaden the guitar, but because of the redistribution of tension, it actually opened up the guitars I put them on - and besides, unless it's an instrument of great collector value, what's the point of a guitar you can't play? In the case of my '68 Goya Cowboy T-23 Verihuge, or whatever it's called, it made the guitar "tighter" sounding sort of like it has compression on it - which I guess it does in a way - but the bottom is still fat. It's not the thinnest top in the world, but it's aged beautifully, and the materials are superb. So it's sort of big and warm now, and also - PLAYABLE! On the other hand, my Larrivee D-03 that I got 2nd hand (serial 083!) has a VERY thin top - a beautiful design, but fragile - not suited for the dry NM climate, or at least w/o careful humidification - was cracked and bulging/sinking like mad. I filled the cracks with Titebond II several times over a few months and then added the Doctor. WOW - not only did it become playable (very nice) it got punch like it probably had new - but as it's oldish now, warm and sweet too. The idea of relieving tension on the lower body behind the bridge is real, I believe. It seems to allow the booty to come back to the instrument.*******All-in-all? Easy to install if you have any mechanical skill, and a real life extender for my bunch of possible has-beens. I'd recommend professional installation for those who are not adept with tools - all I care about is tone, and you can easily mess up the looks of your baby if that matters to you.

5.0

Screw Mount

By

Verified Buyer


Pretty slick arrangement. Simple to do, just try not to misplace that little white thingie! It is in the Twilight Zone as far as I can figure. And I really dont know where to find the silly thing, So i painted the screw black and it works for the $40 guitar it is installed in. Sound got better too.

5.0

Did the trick

By

Verified Buyer


If you have a guitar with a bulge, try this it works, don't rush it adjust a little and wait, give the wood time to respond, ( the bulge didn't happen over night) then adjust some more, it will pull back in to tolerable measurements..sound is good... sustain is better.. stays in tune better, all around good device..

4.0

Worked great!

By

Verified Buyer


This was my first attempt to correct a 70s era Takamine 12 string which had bad action. I was able to restore proper intonation and action with a combination of truss rod adjustment, some sanding of the bone saddle and installation of the screw mount version of the JLD truss. Placement of the screw hole was critical to avoid blocking any of the pin mount holes, but installation was smooth and the effect was immediate. The soundboard had a slight belly as well which was corrected and the sound is still great. Overall I am pleased with the result and will definitely try this again should the need arise.

3.0

JDL Bridge Doctor

By

Verified Buyer


As others have mentioned, the instructions are not very clear or intuitive. If you look at the diagram it appears the block must sit on a brace on the bottom. This was not an option or even necessary or desirable. I installed mine on a 12 string with a severe belly problem. Through research I found it would help to humidify the box and to stack a weight on the top for about a week or more to stabalize the flattened position prior to installing the bridge dr. This would negate having the bridge dr. do all the work. On the positive side, the belly did stabalize with the bridge dr. On the negative side, the tone completly dissapeared. It went from a ringing sound to a thud. The need for all the brass pin replacements and having to keep the bridge dr. fairly tight were probably the cause. I ended up removing it and have built a new bridge, which is incomplete at this time (saddle slot). I think the idea is sound and it may work in some instances. I would try it again on a lesser problem guitar, but not on another 12 string.

5.0

JLD Bridge system

By

Verified Buyer


Installation no problem on my 12 string. If you take care drilling and follow the directions carefully, it's about a half hour job (adding in first time "think about it" delays. Love the product and considering installing it on my 6-string Tak just because.

4.0

Is there a Doctor in the house?

By

Verified Buyer


Well now there are two! I bought the the screw mount but when it arrived, I realized that it wouldn't work on my j200 because of the curved pin line and no room for the screw beneath it but I'll keep it for another guitar. I ordered the brass pin mount, installed it and it works as advertised, flattening the belly, bringing the action down and allowing for better adjustment and enhancing the sound. A side benefit was almost subconcious. Before the doctor was installed, the belly bulge and bridge tilt drew my eye like a wart on someone's nose or an infected lip piercing. Now things are as they should be! My only issue was that on first application, I (yep) broke the dowel. Did I tighten it too much, too quickly, or would a hardwood dowel be the answer? Or would that affect the sound adversely? Or is there a built in fail-safe provided by the pine dowel, allowing it to break before something else does? Whatever, it is easily replaced (I stole one from my other kit temporarily) and my second try went better, adjusting it a little at a time over two to three days which I obviously recommend now. Delayed gratification pays off. The guitar is being played again!

5.0

Favorite Fix for Bellying Guitars

By

Verified Buyer


You know the problem, you get an awesome guitar with great action, and sounds just like you want it. yikes, the bridge has started pulling up and its bringing the wood from the top up with it. Its called bellying. To the rescue - Stew Mac has this awesome product called the Bridge Doctor. A simple installation to bring the bridge back into alignment with the top and carefully bringing the top back down to flatness. I have used this fix on both newer and vintage instruments with great success. I have installed it in at least a dozen of my guitars. Got a Belly problem? No, not your waistline...grab one of these to fix your guitar...the other problem you are on your own to fix. Lawman-Mike

5.0

Worked like a charm!!

By

Verified Buyer


While waiting for snail mail I removed the strings off the guitar and carefully weighted the bridge. In the span of a week this dropped the bow by about 1/16". Doesn't sound like much but it was very noticeable.

The install of the JLD system was very easy. I read other reviews of people snapping the tension rods and such.... This system is based on fulcrum points and leverage... You do not need to 'crank' anything. Your are given three adjustments on the wood block before installing it... Go with the widest one that works with your guitar bridge and bracing as this spreads the load (better leverage) under the bridge. When I installed the dowel I purposely set it at a downward angle towards the back of the guitar for even more leverage... It has worked great. Action is perfect and I am playing this guitar again... I was about to make fire wood out of it.

A few smarts and some planning go a long way here. Think it through... It does work great. I will buy a few more just have on hand.

2.0

Good design, but didn't work for me

By

Verified Buyer


My guess is my guitar had a little more bulge at the bridge than this product was designed to fix. So now I have the item installed and the bridge is still too high to make the guitar playable. If you consider the bulge you're trying to fix as big or extreme I wouldn't purchase this item. If it's small I'm sure the device will pull the bridge & top down to flat and you'll be pleased.

Displaying 9 of 14
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StewMac PDF Catalog, page 31 See JLD Bridge Doctor
on page 31 of our StewMac Digital Catalog